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<title>/usr/web/sources/contrib/cinap_lenrek/ktags.c - Plan 9 from Bell Labs</title>
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<span style="font-size: 10pt"><a href="/plan9/">Plan 9 from Bell Labs</a>&rsquo;s /usr/web/sources/contrib/cinap_lenrek/ktags.c</span></p>
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Copyright © 2009 Alcatel-Lucent.<br />
Distributed under the
<a href="/plan9/license.html">Lucent Public License version 1.02</a>.
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<a href="/plan9/download.html">Download the Plan 9 distribution.</a>
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#include &lt;u.h&gt;
#include &lt;libc.h&gt;

typedef uvlong	Off;
typedef struct Tag Tag;
typedef struct Fbuf Fbuf;
typedef struct Super1 Super1;
typedef struct Superb Superb;

struct	Tag
{
	short	pad;		/* make tag end at a long boundary */
	short	tag;
	Off	path;
};

enum {
	RBUFSIZE = 8*1024,
	BUFSIZE = RBUFSIZE-sizeof(Tag),
};

struct	Super1
{
	Off	fstart;
	Off	fsize;
	Off	tfree;
	Off	qidgen;		/* generator for unique ids */
	/*
	 * Stuff for WWC device
	 */
	Off	cwraddr;	/* cfs root addr */
	Off	roraddr;	/* dump root addr */
	Off	last;		/* last super block addr */
	Off	next;		/* next super block addr */
};

enum {
	FEPERBUF = (BUFSIZE-sizeof(Super1)-sizeof(Off)) / sizeof(Off),
};

struct	Fbuf
{
	Off	nfree;
	Off	free[FEPERBUF];
};

struct	Superb
{
	Fbuf	fbuf;
	Super1;
};

uchar buf[RBUFSIZE];
Off start = 0;

void
main(void)
{
	Tag *t;
	Superb *s;

	t = (Tag*)(buf+BUFSIZE);
	s = (Superb*)buf;
	start = seek(0, start*RBUFSIZE, 0) / RBUFSIZE;
	for(;;){
		if(read(0, buf, RBUFSIZE) != RBUFSIZE){
			fprint(2, "read: %r\n");
			exits("read");
		}
		//print("%llud %d %llud\n", start, t-&gt;tag, t-&gt;path);
		if(t-&gt;tag == 1 &amp;&amp; t-&gt;path == 2){
			print("%llud "
				"fstart %llud fsize %llud "
				"cwraddr %llud roraddr %llud "
				"last %llud next %llud\n",
				start,
				s-&gt;fstart, s-&gt;fsize, 
				s-&gt;cwraddr,
				s-&gt;roraddr,
				s-&gt;last, s-&gt;next);
		}
		start++;
	}
}
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